sun.security.pkcs.PKCS7 Java Examples

static void checkTimestamp(String file, String policyId, String digestAlg)
        throws Exception {
    try (JarFile jf = new JarFile(file)) {
        JarEntry je = jf.getJarEntry("META-INF/SIGNER.RSA");
        try (InputStream is = jf.getInputStream(je)) {
            byte[] content = IOUtils.readAllBytes(is);
            PKCS7 p7 = new PKCS7(content);
            SignerInfo[] si = p7.getSignerInfos();
            if (si == null || si.length == 0) {
                throw new Exception("Not signed");
            }
            PKCS9Attribute p9 = si[0].getUnauthenticatedAttributes()
                    .getAttribute(PKCS9Attribute.SIGNATURE_TIMESTAMP_TOKEN_OID);
            PKCS7 tsToken = new PKCS7((byte[]) p9.getValue());
            TimestampToken tt =
                    new TimestampToken(tsToken.getContentInfo().getData());
            if (!tt.getHashAlgorithm().toString().equals(digestAlg)) {
                throw new Exception("Digest alg different");
            }
            if (!tt.getPolicyID().equals(policyId)) {
                throw new Exception("policyId different");
            }
        }
    }
}
 

static void checkTimestamp(String file, String policyId, String digestAlg)
        throws Exception {
    try (JarFile jf = new JarFile(file)) {
        JarEntry je = jf.getJarEntry("META-INF/SIGNER.RSA");
        try (InputStream is = jf.getInputStream(je)) {
            byte[] content = IOUtils.readAllBytes(is);
            PKCS7 p7 = new PKCS7(content);
            SignerInfo[] si = p7.getSignerInfos();
            if (si == null || si.length == 0) {
                throw new Exception("Not signed");
            }
            PKCS9Attribute p9 = si[0].getUnauthenticatedAttributes()
                    .getAttribute(PKCS9Attribute.SIGNATURE_TIMESTAMP_TOKEN_OID);
            PKCS7 tsToken = new PKCS7((byte[]) p9.getValue());
            TimestampToken tt =
                    new TimestampToken(tsToken.getContentInfo().getData());
            if (!tt.getHashAlgorithm().toString().equals(digestAlg)) {
                throw new Exception("Digest alg different");
            }
            if (!tt.getPolicyID().equals(policyId)) {
                throw new Exception("policyId different");
            }
        }
    }
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/**
 * get certificate info
 *
 * @throws IOException
 * @throws CertificateEncodingException
 */
public void parse() throws IOException, CertificateException {

    PKCS7 pkcs7 = new PKCS7(Utils.toByteArray(in));
    X509Certificate[] certificates = pkcs7.getCertificates();
    certificateMetas = new ArrayList<>();
    for (X509Certificate certificate : certificates) {
        CertificateMeta certificateMeta = new CertificateMeta();
        certificateMetas.add(certificateMeta);

        byte[] bytes = certificate.getEncoded();
        String certMd5 = md5Digest(bytes);
        String publicKeyString = byteToHexString(bytes);
        String certBase64Md5 = md5Digest(publicKeyString);
        certificateMeta.setData(bytes);
        certificateMeta.setCertBase64Md5(certBase64Md5);
        certificateMeta.setCertMd5(certMd5);
        certificateMeta.setStartDate(certificate.getNotBefore());
        certificateMeta.setEndDate(certificate.getNotAfter());
        certificateMeta.setSignAlgorithm(certificate.getSigAlgName());
        certificateMeta.setSignAlgorithmOID(certificate.getSigAlgOID());
    }
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

static void checkTimestamp(String file, String policyId, String digestAlg)
        throws Exception {
    try (JarFile jf = new JarFile(file)) {
        JarEntry je = jf.getJarEntry("META-INF/OLD.RSA");
        try (InputStream is = jf.getInputStream(je)) {
            byte[] content = is.readAllBytes();
            PKCS7 p7 = new PKCS7(content);
            SignerInfo[] si = p7.getSignerInfos();
            if (si == null || si.length == 0) {
                throw new Exception("Not signed");
            }
            PKCS9Attribute p9 = si[0].getUnauthenticatedAttributes()
                    .getAttribute(PKCS9Attribute.SIGNATURE_TIMESTAMP_TOKEN_OID);
            PKCS7 tsToken = new PKCS7((byte[]) p9.getValue());
            TimestampToken tt =
                    new TimestampToken(tsToken.getContentInfo().getData());
            if (!tt.getHashAlgorithm().toString().equals(digestAlg)) {
                throw new Exception("Digest alg different");
            }
            if (!tt.getPolicyID().equals(policyId)) {
                throw new Exception("policyId different");
            }
        }
    }
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/** Write the certificate file with a digital signature. */
private void writeSignatureBlock(Signature signature, X509Certificate publicKey,
        PrivateKey privateKey)
        throws IOException, GeneralSecurityException {
    SignerInfo signerInfo = new SignerInfo(
            new X500Name(publicKey.getIssuerX500Principal().getName()),
            publicKey.getSerialNumber(),
            AlgorithmId.get(DIGEST_ALGORITHM),
            AlgorithmId.get(privateKey.getAlgorithm()),
            signature.sign());

    PKCS7 pkcs7 = new PKCS7(
            new AlgorithmId[] { AlgorithmId.get(DIGEST_ALGORITHM) },
            new ContentInfo(ContentInfo.DATA_OID, null),
            new X509Certificate[] { publicKey },
            new SignerInfo[] { signerInfo });

    pkcs7.encodeSignedData(mOutputJar);
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte[] rawBytes)
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf('.'))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/**
 * Write the certificate file with a digital signature.
 */
private void writeSignatureBlock(Signature signature, X509Certificate publicKey,
                                 PrivateKey privateKey)
        throws IOException, GeneralSecurityException {
    SignerInfo signerInfo = new SignerInfo(
            new X500Name(publicKey.getIssuerX500Principal().getName()),
            publicKey.getSerialNumber(),
            AlgorithmId.get(DIGEST_ALGORITHM),
            AlgorithmId.get(privateKey.getAlgorithm()),
            signature.sign());
    PKCS7 pkcs7 = new PKCS7(
            new AlgorithmId[]{AlgorithmId.get(DIGEST_ALGORITHM)},
            new ContentInfo(ContentInfo.DATA_OID, null),
            new X509Certificate[]{publicKey},
            new SignerInfo[]{signerInfo});
    pkcs7.encodeSignedData(mOutputJar);
}
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

/**
 * Generates a PKCS #7 signed data message that includes a signature
 * timestamp.
 * This method is used when a signature has already been generated.
 * The signature, a signature timestamp, the signer's certificate chain,
 * and optionally the content that was signed, are packaged into a PKCS #7
 * signed data message.
 *
 * @param params The non-null input parameters.
 * @param omitContent true if the content should be omitted from the
 *        signed data message. Otherwise the content is included.
 * @param applyTimestamp true if the signature should be timestamped.
 *        Otherwise timestamping is not performed.
 * @return A PKCS #7 signed data message including a signature timestamp.
 * @throws NoSuchAlgorithmException The exception is thrown if the signature
 *         algorithm is unrecognised.
 * @throws CertificateException The exception is thrown if an error occurs
 *         while processing the signer's certificate or the TSA's
 *         certificate.
 * @throws IOException The exception is thrown if an error occurs while
 *         generating the signature timestamp or while generating the signed
 *         data message.
 * @throws NullPointerException The exception is thrown if parameters is
 *         null.
 */
public byte[] generateSignedData(ContentSignerParameters params,
    boolean omitContent, boolean applyTimestamp)
        throws NoSuchAlgorithmException, CertificateException, IOException {

    if (params == null) {
        throw new NullPointerException();
    }

    // Parse the signature algorithm to extract the digest
    // algorithm. The expected format is:
    //     "<digest>with<encryption>"
    // or  "<digest>with<encryption>and<mgf>"
    String signatureAlgorithm = params.getSignatureAlgorithm();

    X509Certificate[] signerChain = params.getSignerCertificateChain();
    byte[] signature = params.getSignature();

    // Include or exclude content
    byte[] content = (omitContent == true) ? null : params.getContent();

    URI tsaURI = null;
    if (applyTimestamp) {
        tsaURI = params.getTimestampingAuthority();
        if (tsaURI == null) {
            // Examine TSA cert
            tsaURI = getTimestampingURI(
                params.getTimestampingAuthorityCertificate());
            if (tsaURI == null) {
                throw new CertificateException(
                    "Subject Information Access extension not found");
            }
        }
    }
    return PKCS7.generateSignedData(signature, signerChain, content,
                                    params.getSignatureAlgorithm(), tsaURI,
                                    params.getTSAPolicyID(),
                                    params.getTSADigestAlg());
}
 

public static void main(String[] args) throws Exception {

        byte[] data = "Hello".getBytes();
        X500Name n = new X500Name("cn=Me");

        CertAndKeyGen cakg = new CertAndKeyGen("RSA", "SHA256withRSA");
        cakg.generate(1024);
        X509Certificate cert = cakg.getSelfCertificate(n, 1000);

        MessageDigest md = MessageDigest.getInstance("SHA-256");
        PKCS9Attributes authed = new PKCS9Attributes(new PKCS9Attribute[]{
            new PKCS9Attribute(PKCS9Attribute.CONTENT_TYPE_OID, ContentInfo.DATA_OID),
            new PKCS9Attribute(PKCS9Attribute.MESSAGE_DIGEST_OID, md.digest(data)),
        });

        Signature s = Signature.getInstance("SHA256withRSA");
        s.initSign(cakg.getPrivateKey());
        s.update(authed.getDerEncoding());
        byte[] sig = s.sign();

        SignerInfo signerInfo = new SignerInfo(
                n,
                cert.getSerialNumber(),
                AlgorithmId.get("SHA-256"),
                authed,
                AlgorithmId.get("SHA256withRSA"),
                sig,
                null
                );

        PKCS7 pkcs7 = new PKCS7(
                new AlgorithmId[] {signerInfo.getDigestAlgorithmId()},
                new ContentInfo(data),
                new X509Certificate[] {cert},
                new SignerInfo[] {signerInfo});

        if (pkcs7.verify(signerInfo, data) == null) {
            throw new Exception("Not verified");
        }
    }
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

/**
 * Given the PKCS7 block and SignerInfo[], create an array of
 * CodeSigner objects. We do this only *once* for a given
 * signature block file.
 */
private CodeSigner[] getSigners(SignerInfo[] infos, PKCS7 block)
    throws IOException, NoSuchAlgorithmException, SignatureException,
        CertificateException {

    ArrayList<CodeSigner> signers = null;

    for (int i = 0; i < infos.length; i++) {

        SignerInfo info = infos[i];
        ArrayList<X509Certificate> chain = info.getCertificateChain(block);
        CertPath certChain = certificateFactory.generateCertPath(chain);
        if (signers == null) {
            signers = new ArrayList<>();
        }
        // Append the new code signer
        signers.add(new CodeSigner(certChain, info.getTimestamp()));

        if (debug != null) {
            debug.println("Signature Block Certificate: " +
                chain.get(0));
        }
    }

    if (signers != null) {
        return signers.toArray(new CodeSigner[signers.size()]);
    } else {
        return null;
    }
}
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

public static void main(String[] args) throws Exception {

        byte[] data = "Hello".getBytes();
        X500Name n = new X500Name("cn=Me");

        CertAndKeyGen cakg = new CertAndKeyGen("RSA", "SHA256withRSA");
        cakg.generate(1024);
        X509Certificate cert = cakg.getSelfCertificate(n, 1000);

        MessageDigest md = MessageDigest.getInstance("SHA-256");
        PKCS9Attributes authed = new PKCS9Attributes(new PKCS9Attribute[]{
            new PKCS9Attribute(PKCS9Attribute.CONTENT_TYPE_OID, ContentInfo.DATA_OID),
            new PKCS9Attribute(PKCS9Attribute.MESSAGE_DIGEST_OID, md.digest(data)),
        });

        Signature s = Signature.getInstance("SHA256withRSA");
        s.initSign(cakg.getPrivateKey());
        s.update(authed.getDerEncoding());
        byte[] sig = s.sign();

        SignerInfo signerInfo = new SignerInfo(
                n,
                cert.getSerialNumber(),
                AlgorithmId.get("SHA-256"),
                authed,
                AlgorithmId.get("SHA256withRSA"),
                sig,
                null
                );

        PKCS7 pkcs7 = new PKCS7(
                new AlgorithmId[] {signerInfo.getDigestAlgorithmId()},
                new ContentInfo(data),
                new X509Certificate[] {cert},
                new SignerInfo[] {signerInfo});

        if (pkcs7.verify(signerInfo, data) == null) {
            throw new Exception("Not verified");
        }
    }
 

private Collection<? extends java.security.cert.Certificate>
    parseX509orPKCS7Cert(InputStream is)
    throws CertificateException, IOException
{
    Collection<X509CertImpl> coll = new ArrayList<>();
    byte[] data = readOneBlock(is);
    if (data == null) {
        return new ArrayList<>(0);
    }
    try {
        PKCS7 pkcs7 = new PKCS7(data);
        X509Certificate[] certs = pkcs7.getCertificates();
        // certs are optional in PKCS #7
        if (certs != null) {
            return Arrays.asList(certs);
        } else {
            // no crls provided
            return new ArrayList<>(0);
        }
    } catch (ParsingException e) {
        while (data != null) {
            coll.add(new X509CertImpl(data));
            data = readOneBlock(is);
        }
    }
    return coll;
}
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

private Collection<? extends java.security.cert.Certificate>
    parseX509orPKCS7Cert(InputStream is)
    throws CertificateException, IOException
{
    Collection<X509CertImpl> coll = new ArrayList<>();
    byte[] data = readOneBlock(is);
    if (data == null) {
        return new ArrayList<>(0);
    }
    try {
        PKCS7 pkcs7 = new PKCS7(data);
        X509Certificate[] certs = pkcs7.getCertificates();
        // certs are optional in PKCS #7
        if (certs != null) {
            return Arrays.asList(certs);
        } else {
            // no crls provided
            return new ArrayList<>(0);
        }
    } catch (ParsingException e) {
        while (data != null) {
            coll.add(new X509CertImpl(data));
            data = readOneBlock(is);
        }
    }
    return coll;
}
 

public static void main(String[] args) throws Exception {

        byte[] data = "Hello".getBytes();
        X500Name n = new X500Name("cn=Me");

        CertAndKeyGen cakg = new CertAndKeyGen("RSA", "SHA256withRSA");
        cakg.generate(1024);
        X509Certificate cert = cakg.getSelfCertificate(n, 1000);

        MessageDigest md = MessageDigest.getInstance("SHA-256");
        PKCS9Attributes authed = new PKCS9Attributes(new PKCS9Attribute[]{
            new PKCS9Attribute(PKCS9Attribute.CONTENT_TYPE_OID, ContentInfo.DATA_OID),
            new PKCS9Attribute(PKCS9Attribute.MESSAGE_DIGEST_OID, md.digest(data)),
        });

        Signature s = Signature.getInstance("SHA256withRSA");
        s.initSign(cakg.getPrivateKey());
        s.update(authed.getDerEncoding());
        byte[] sig = s.sign();

        SignerInfo signerInfo = new SignerInfo(
                n,
                cert.getSerialNumber(),
                AlgorithmId.get("SHA-256"),
                authed,
                AlgorithmId.get("SHA256withRSA"),
                sig,
                null
                );

        PKCS7 pkcs7 = new PKCS7(
                new AlgorithmId[] {signerInfo.getDigestAlgorithmId()},
                new ContentInfo(data),
                new X509Certificate[] {cert},
                new SignerInfo[] {signerInfo});

        if (pkcs7.verify(signerInfo, data) == null) {
            throw new Exception("Not verified");
        }
    }
 

/**
 * Given the PKCS7 block and SignerInfo[], create an array of
 * CodeSigner objects. We do this only *once* for a given
 * signature block file.
 */
private CodeSigner[] getSigners(SignerInfo[] infos, PKCS7 block)
    throws IOException, NoSuchAlgorithmException, SignatureException,
        CertificateException {

    ArrayList<CodeSigner> signers = null;

    for (int i = 0; i < infos.length; i++) {

        SignerInfo info = infos[i];
        ArrayList<X509Certificate> chain = info.getCertificateChain(block);
        CertPath certChain = certificateFactory.generateCertPath(chain);
        if (signers == null) {
            signers = new ArrayList<>();
        }
        // Append the new code signer
        signers.add(new CodeSigner(certChain, info.getTimestamp()));

        if (debug != null) {
            debug.println("Signature Block Certificate: " +
                chain.get(0));
        }
    }

    if (signers != null) {
        return signers.toArray(new CodeSigner[signers.size()]);
    } else {
        return null;
    }
}
 

/**
 * Create the named SignatureFileVerifier.
 *
 * @param name the name of the signature block file (.DSA/.RSA/.EC)
 *
 * @param rawBytes the raw bytes of the signature block file
 */
public SignatureFileVerifier(ArrayList<CodeSigner[]> signerCache,
                             ManifestDigester md,
                             String name,
                             byte rawBytes[])
    throws IOException, CertificateException
{
    // new PKCS7() calls CertificateFactory.getInstance()
    // need to use local providers here, see Providers class
    Object obj = null;
    try {
        obj = Providers.startJarVerification();
        block = new PKCS7(rawBytes);
        sfBytes = block.getContentInfo().getData();
        certificateFactory = CertificateFactory.getInstance("X509");
    } finally {
        Providers.stopJarVerification(obj);
    }
    this.name = name.substring(0, name.lastIndexOf("."))
                                               .toUpperCase(Locale.ENGLISH);
    this.md = md;
    this.signerCache = signerCache;
}
 

/**
 * Encode the CertPath using PKCS#7 format.
 *
 * @return a byte array containing the binary encoding of the PKCS#7 object
 * @exception CertificateEncodingException if an exception occurs
 */
private byte[] encodePKCS7() throws CertificateEncodingException {
    PKCS7 p7 = new PKCS7(new AlgorithmId[0],
                         new ContentInfo(ContentInfo.DATA_OID, null),
                         certs.toArray(new X509Certificate[certs.size()]),
                         new SignerInfo[0]);
    DerOutputStream derout = new DerOutputStream();
    try {
        p7.encodeSignedData(derout);
    } catch (IOException ioe) {
        throw new CertificateEncodingException(ioe.getMessage());
    }
    return derout.toByteArray();
}
 

/**
 * Given the PKCS7 block and SignerInfo[], create an array of
 * CodeSigner objects. We do this only *once* for a given
 * signature block file.
 */
private CodeSigner[] getSigners(SignerInfo infos[], PKCS7 block)
    throws IOException, NoSuchAlgorithmException, SignatureException,
        CertificateException {

    ArrayList<CodeSigner> signers = null;

    for (int i = 0; i < infos.length; i++) {

        SignerInfo info = infos[i];
        ArrayList<X509Certificate> chain = info.getCertificateChain(block);
        CertPath certChain = certificateFactory.generateCertPath(chain);
        if (signers == null) {
            signers = new ArrayList<CodeSigner>();
        }
        // Append the new code signer
        signers.add(new CodeSigner(certChain, info.getTimestamp()));

        if (debug != null) {
            debug.println("Signature Block Certificate: " +
                chain.get(0));
        }
    }

    if (signers != null) {
        return signers.toArray(new CodeSigner[signers.size()]);
    } else {
        return null;
    }
}
 

public static void main(String[] args) throws Exception {

        byte[] data = "Hello".getBytes();
        X500Name n = new X500Name("cn=Me");

        CertAndKeyGen cakg = new CertAndKeyGen("RSA", "SHA256withRSA");
        cakg.generate(1024);
        X509Certificate cert = cakg.getSelfCertificate(n, 1000);

        MessageDigest md = MessageDigest.getInstance("SHA-256");
        PKCS9Attributes authed = new PKCS9Attributes(new PKCS9Attribute[]{
            new PKCS9Attribute(PKCS9Attribute.CONTENT_TYPE_OID, ContentInfo.DATA_OID),
            new PKCS9Attribute(PKCS9Attribute.MESSAGE_DIGEST_OID, md.digest(data)),
        });

        Signature s = Signature.getInstance("SHA256withRSA");
        s.initSign(cakg.getPrivateKey());
        s.update(authed.getDerEncoding());
        byte[] sig = s.sign();

        SignerInfo signerInfo = new SignerInfo(
                n,
                cert.getSerialNumber(),
                AlgorithmId.get("SHA-256"),
                authed,
                AlgorithmId.get("SHA256withRSA"),
                sig,
                null
                );

        PKCS7 pkcs7 = new PKCS7(
                new AlgorithmId[] {signerInfo.getDigestAlgorithmId()},
                new ContentInfo(data),
                new X509Certificate[] {cert},
                new SignerInfo[] {signerInfo});

        if (pkcs7.verify(signerInfo, data) == null) {
            throw new Exception("Not verified");
        }
    }
 

private Collection<? extends java.security.cert.CRL>
    parseX509orPKCS7CRL(InputStream is)
    throws CRLException, IOException
{
    Collection<X509CRLImpl> coll = new ArrayList<>();
    byte[] data = readOneBlock(is);
    if (data == null) {
        return new ArrayList<>(0);
    }
    try {
        PKCS7 pkcs7 = new PKCS7(data);
        X509CRL[] crls = pkcs7.getCRLs();
        // CRLs are optional in PKCS #7
        if (crls != null) {
            return Arrays.asList(crls);
        } else {
            // no crls provided
            return new ArrayList<>(0);
        }
    } catch (ParsingException e) {
        while (data != null) {
            coll.add(new X509CRLImpl(data));
            data = readOneBlock(is);
        }
    }
    return coll;
}